Shoe-sole trimmer.



MJS. MUNN.

SHOE SOLE TRIMMER.

' APPLIUATION FILED Amm, 1912.

Eatented May 6, 1913.

FEB g Tvzll @hom est may concern I' i f nN-rrnn s'r.

rien..

MERTON s. MUNN; or STXLLWATER; MINNESOTA.

SHOE-SOLE 'rmi/linnn.

e it known that-I, MERTON b. `MUNN, a

citizen of the United States, residing at Stillwater, in the. county of llvashington andlreference t'o the part of such machines known as the cutter and t-he eut-ter head.

y The object of the invention is to save material and labor in the makingof the cutters. Another object is to save considerable time in the use of such trimming tools, and a further 'object isto enable the workman to do-be-tter' work than .with the cutters heretofore used.

. In the accompanying drawing, Figurel is a side elevation ofa sole trimming marhine provided with my improved cutter and cutter head and a shoe in position to be operated on bythe machine. vFig. 2 is an enlarged left hand'end yiew of the shaft and cutter shown in Fig.- 1 with the plate' 13 and screw 12 removed. Fig. 3 is a side yview of the shaft 8 inFigs. 1 and 2 and a diametrical section on the line cz-d of the cutter head andthe cutter, except that the internal spring 2,8 and the top portion of l. the cutter are not in section.

4Fig. l is a series of rings of diii'erent outside diameters for 4purposes hereinafter described.. 'y

Referring to the drawing by reference numerals, 1 designates the frame, 2 the countershaft therein with tight, pulley 3 and loose pulley 4:. On said Vsh'aft is fixed Va larger pulley 5 driving by a'belt G a smaller pulley 7 which is fixed on the cutter shaft y The latter shaft is. journaled in the upper end of 'the frame and has one end conic as shown at 94in Fig. 3. Upon said cone is placed internally cone shaped collar 10, which is divided radially into four :equal sections, as best shown in `Fig. 2. The

cutter 11 has its cent-ral cylindrical hole placed upon said divided collar and is firmly secured on the shaft by a` screw 12, which is threaded into the end of the shaft, and a shield'l which presses against the outer end of 'the collar. Said shield also serves to shield thev upper of the shoe from contact with the cutter when the latter is in rotating operation on the edge 14 of the sole;

15 of the shoe 16.

Specication of Letters Patent.

Application filed. August; S, 1912; Serial No. 714,020.-

Patented May Against thefrear'side of the'cutter is fitted awasher or ring 17, which is rotatably retained between. the cutter and the'external iange 18 of a collar 19, uponwvhose'short front endv 2O the ring is journaled. The rear end of'said collar 19 is detachably threaded,l

22,.whos`e front portion it 'v e at 21 into a drum forms. T he ends of the drum .are guided on the shaft by an internal flange 23 and a simi#v lar flange 24C of the collarlt). 1n the rear end of the drum is 'movably secured on the "shaft by a set screw 25 a collar 2G; 27 is a slot in the drum for said screw 25 to move in when the collar 1s changed forward so as to give more'tension to a spring 2S which ispartly compressed between the collars 19 and 26. .The function of thespring is 'to hold'the `parts 17 and 2O close to the cutter without Ahaving to movethe Collar 26 and secure it-or tne drum in a new place for .each variation of thicknessfof Acutters used.' It will be seen that the'diameter of the ring 17.is the sameas that ofthe,adjacent part 11a of the cutter, vso thatthe latter can not niar the `heel ofthe shoe althoughby said construction ofA the cutter and ring the operator is able to start the trimming of the sole close by the heel at.one side and con tinue close to theheel at the other sidev of the shoe, while in thevcutters heretofore used the rim 11n much larger than the rest of the cutter and hence a second' cutter and a seccnd operation required for -trimming the sole near the heel by a so-called shank cutter, Such second tool and" operation involve timel and expenses Vwhich'are obviated' ...-nother advantage is that by myy device.

ring 17 1s made while in earlier cutters the integral with the drum 22 or at least with the collar 1S, so that when the cutter is reduced in diameter by wear and grinding the ycollar or ring 17 must be ground or turned smaller from time to time until it is ldestroyed or it will hold the reduced cutter farther and farther away from'the heel, I simply exchange the ring 17 for the next smaller size 17 1, then 17b &c of the series of rings sho in Fig. gt-Nand which are fur.- nished with eachmachine and can be used over and over again in wearing out 'many cutters. I thus save the material and labor required lo destroy and reproduce and re the leather but will trim4 the lowered e oi 'the .soles even if theyvary some invt ick- -ness; hence only for' greater variations of thickness need. thel cutter be exchanged for chinery running the 'second cutter, it evi-l j dentthat there isla-considerable, saving of" labor, -material and -machinery by the use of my improvements, There is .also lmore and,

better work done.y It should benoted that rtion 11'* of the.' cutter .has 1a. suicient y wlderfa'ce to make-no sharpcrease in v thicker o'ne,having awider face. i

' 41; In a machine of th nieuwe so as u) at in 'the said-ring' ,and hold it- '.in'co'ncentric position: to the cutter, 'aA springfri A'diana Aon the sha '25 @the cutter,and'having'its front end vrreng, and means ltireyenting 'rlt-'atlon' of the' :1n a machine oathsclass describe-Qa', me

eo 1nbin`ation ofa rotary, shaft, aV cutter rermovably. secured onl one lend, thereof., a] re- 'movableringf bearing' 'against'- the rear' side ldable'on the. shaft .offthecutten'a drum s its front end re- .mrgjtbgfcutter and having it inthe v Said-ring and hold'.

`having, in one 'sidea -lo the latter against the ble' ring bearing against thef rear `side cutter, va drumslidable on the shaft (mmm it in concentric position to the cutterfsaid 3.' In a machine of 'combination :with a rotary shaft. haring a lcone-shaped end with a threaded hole 'in the v. center thereof, of an internally conic' split e class described, the' bushing fitted. uponthe cone, a rotary cutter having a'centralcylindrical hole Iittin' Luon the-split bushing, a washer onthe en the shaft .in concentric ositionjto 'the [cutter 'andbearing against t e outer end of:

the split bushing', a 'screw passed through a ,central :hole` in the 'washer 'and into the threaded hole of the shaft', said washer servi-ng to' wedge the bushing tightly into, place 'and serving also as a shield at the vforl Ward 'side of theteeth of the cutten* vIn,testi1no'ny whereof aix myy signature, in presencev of two witnesses.A

Witnesses: 13001112151,

R. B` Mclmmms 'tudinrl 1 rture, a collar adjustab e onthe MEBTON s Mass. 'A

spri between the collar agd- 

